Electric-arc lamp.



PATENTED OCT. 27, 1903.

J. MELZER. ELECTRIC ARC LAMP.

APPLIUATION FILED JAN. 2, 1903.

2 SHEETS-SHEET 1- H0 MODEL.

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No. 742,706. PATENTBD OCT. 27, 1903.

J. MELZER ELECTRIC ARC LAMP.

APPLICATION FILED JAN. 2, 1903.

N0 MODEL.

2 SHEETS-SHEET 2.

E 5 6," 6 6 66-6," Eweniofi No. 742,706. Patented October 27, 1903.

UNITED STATES PATENT OEEIcE.

JOSEPH MELZER, OF CLEVELAND, OHIO, ASSIGNOR TO THE OSBORN-MORGANCOMPANY, OF CLEVELAND, OHIO, A CORPORATION OF NElV JERSEY.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 742,706, dated October27, 1903. Application filed January 2,1903. Serial No. 137, N l

To all whom it may concern: with the cap I), screwed onto the end of theBe it known that I, JOSEPH MELZER, a cititube. On the upper end of thistube A, bezen of the United States, residing at Oleve neath the cap I),is screwed a spider-ring E. land, in the county of Ouyahoga and State ofThis ring carries the portions J and J of the 5 Ohio, have invented acertain new and usecasin g. Rising from the ring are lugs c and fulImprovement in Electric-Arc Lamps, of e, on which rest dependent lugs (Zand d from which the following is a full, clear, and exact a plate D,the ring and the plate being sedescription, reference being had to theaccured together by bolts E, screwing through companying drawings. thelugs e and d. The magnet Fis clamped IO The object of this invention isto provide between the plate D and the plate 0 above an arc-lamp adaptedfor either direct or alterit, bolts 0 holding these parts together.nating current in a form which shall be very he magnet F, which operatesalso as the cheap in construction, while being efficient inchoking-coil, is of the horseshoe type, having service. 111accomplishing this I arrange the a laminated core f, composed of aseries of I5 magnet which operates the carbon-clutch in iron plates,around which is wound the usual suchaform that it itself operates as thechokconductor F, and this conductor is so aring-coil. This very muchsimplifies the conranged'that connections can be made to it atstruction. To further simplify the construcvarious points, according tothe currentwith tion, I connect the dash-pot directly with the which thelamp is to be used. These various 7o 20 armature of the magnet, theconnection he points of connection are indicated at f in tween thearmature and clutch having a flexi- Fig. 2. ble portion to preventcontinuallyjerkingthe The pole-faces of the horseshoe are conclutch whenalternating current is used. The caved to make a circular recess, and inthis dash-pot prevents the too sudden shifting of recess is the cylinderII of the dash-pot, sup- 2 5 the carbon, as is usual; butby rigidlymountported by the plate 0, which at this point ing one of its members,as the plunger, upon makes a head for the cylinder. This cylinder thearmature the construction is simplified is of some non-magneticmaterial, as brass, and the efficiency increased. This one of andbetween it and the magnet there is prefthe features of my invention.erably a padding G of felt or mica or some 30 Other features will appearhereinafter in non-conductor of heat.

the more specific description, wherefore my \Vithin the dash-potcylinder H slides the invention may be most conveniently sumdash-potplunger. This plunger has a head marized as consisting of thecombination of 7c of magnetic material partly outside the cylpartsdescribed herein and definitely set out inder, which constitutes thearmature for 3 5 in the claims. magnet. A rod 7c rises from this head,and In the drawings which clearly illustrate my a graphite filler 7&around this red constitutes invention, Figure 1 is a vertical centralseca piston for the cylinder, the graphite being tion of the lamp. Fig.2 is a plan in section carried betweentheinnerhead It and awasher of thecombined magnet and choking coil. 70 at the upper end of the rod. 40Fig. 3 is a vertical section across the two arms The result of theabove-described construcof the magnet. Fig. etis a plan of the frametion is that whenever the flow of current parts below the magnet. Fig. 5is a sectional through the magnet increases the plunger is plan on theline 5 5 of Fig. 1, showing the drawn upward. lVhen it decreases, theswitch. plunger gradually descends by gravity. 9 5 45 Referring to theparts by letters, A. reprc- Anyusualform of clutchmaybe employcd- I a lsents a central tube, which contains the upas, for example, aring-clutch L shown. Exper carbon and which constitutes a portiontending upward from this clutch is a rod N, of the main frame of thelamp. In this tube the upper end of which is threaded. On this iscontained a thimble B for receiving the upthread screws a nut I, towhich is secured by [00 50 per end of the upper carbon Y, this thimble ascrew 1) the lower end of a sheet-metal being connected by a flexibleconductor 1) l clamp 19, which grasps a cord 19 connected in is one ofthe features like manner at its upper end to an arm 7;, depending fromthe plunger of the dash-pot. The flexibility of the cord prevents thevery slight vibration of the plunger consequent upon alterations of thecurrent from affecting the clutch, while the arrangement of the nut Pallows the very convenient adjustment of these parts by the removal ofthe screw p and the turning of the nut in one direction or the other.The use of the flexible connection is already set out and claimed in myprior application, Serial No. 123,727; but the adjustable arrangement ofthe same shown herein of this invention.

Secured to the lower end of the tube A by clamping-plates R and Rscrewing thereonto is an insulating-block Q, which carries the rod T forthe lower carbon. It also supports the inner globe S through theintervention of the spring S, links S and bolts S The outer globe S issupported by means of usual setscrews from a casing S suspended by hooksS, of which three may be conveniently employed. These parts, however,may be of any desired construction.

Mounted on the sleeve U, secured around the tube A, is a switch U, whichoperates to open the circuit or close it either without resistance orthrough the resistance V, which consists of a helix of resistancewiresupported within insulators located at intervals around the periphery ofthe block Q. The resistance-wire is used when the direct current isemployed, but idle with the alternating current, as the choking-coilthen takes its place.

The blade 10 0f the switch is connected with the negative-carbon rod Tand cooperates with the two contact-plates u and la the former of whichis connected through the resistance V to the negative terminal, and thelatter of which is connected directly without resistance to the magnet,the positive electrode leading through the choking-coil or magnet.

In Fig. 1, IV is the positive binding-post, and IW the negativebinding-post, supported bya portion of the casing J clamped between theframe-plate O and the supporting-eye M. The course of the current is asfollows: from the positive binding-post W, via the conductor 1, throughthe chokingcoil to the frame, and thence to the upper carbon Y, thenceto the lower carbon Z, and via the rod T and the conductor 2 to theblade 101 of the switch. In the mid-position of the switch the circuitis open at this point. If the switchlever is shifted to engage thecontact-point Lt, the circuit continues via the resistance V to theconductor 3 and thence to the negative binding-post If the switch is inthe other extreme position, the circuit continues from the switch -leverto the contact-point 10 to the conductor 4:, and thence to the negativebinding-post IV? By the above-described construction it will I be seenthat I have provided in avery simple structure a lamp which may be usedwith either director alternating currents,the switch being simply thrownfrom the off position in one direction for a direct current and in theother direction for an alternating current. The consolidation of theoperating-magnet and choking-coil into one structure, and likewise theconsolidation into one structure of the armature and dashpot plunger,simplifies and cheapens the construction.

I claim 1. In an arc-lamp, the combination of a horseshoe-magnet,adash-pot cylinder mounted between the pole-faces of the magnet, aplunger for said cylinder connected with the armature of the magnet andthe earbon-clutcl I, substantially as described.

2. In an arc-lamp, in combination, a horizontal horseshoe-magnet, avertical dash-pot cylinder mounted the magnet, an armature for saidmagnet rigidly connected with the plunger oi the dashpot,and a clutchconnected with the armature, substantially as described.

In an arc-lamp, in combination, a horseshoe-magnet, a plate above thesame forsupporting the magnet, a dash pot cylinder mounted between thepole-faces of the magnet, said plate constituting the head of thecylinder, a plunger for the dash-pot, the armature of the magnet beingrigidly connected with said plunger, and a clutch operated by saidarmature, substantially as described.

1-. In an arc-lamp, in combination, a horizontal horseshoe-magnet, adash-pot cylinder mounted between the pole-faces of the magnet, aframework for supporting said magnet, a central tube for the uppercarbon carried by said framework, a plunger for said dash-pot, anarmature rigid therein, an inwardly-extending arm rigid with thearmature, a clutch for the upper carbon, and a flexible connectionbetween said clutch and said arm, substantiall T as described.

5. In an arc-lamp, in combination, a horseshoe-magnet, a cyl indermounted between the pole-laces thereof, a plunger for said cylinder, arod extending through said plunger, an armature and an arm rigidlyconnected with said plunger by said rod, and a clutch operated by saidarm, substantially as described.

6. In an arc-lamp, in combination, a i'nagnet, an armature therefor, anarm carried thereby, a flexible cord secured to-said arm and carrying ametal clip, a nut to which said clip is removably secured, a rod onwhich said nut screws, and a clutch operated by said rod, substantiallyas described.

In testimony whereof I hereunto al'lix my signature in the presence oftwo witnesses.

J ()Sltll I MELZER.

H. O. OSBORN,

\Vitnesses: l ALBERT II. Barns.

between the pole-.l'aces of IIO

